Something I noticed SPOILERS
The timing of Lady Van Tassel staging her fake death was quite interesting to me.
As we saw when the Horseman started attacking at the town meeting in the church, he couldn't enter the hallowed ground.
So, knowing in advance about the meeting taking place there, Lady Van Tassel planned for her death to take place when she and Baltus were supposed to be on their way to the meeting to cover up her involvement with the Horseman. As a witch, surely she wouldn't have been able to cross onto the hallowed ground?...
I know that might sound unlikely since in this community religion was a big component and she would have been a regular churchgoer as the apparent good natured wife of a powerful man in town and her fake death was ultimately to put us off her trail because we thought she had been murdered rather than being a witch in control of the Horseman, but it was just something that struck me.